Woodworking-machine.



H. B. RANDALL. WOODWORKING MAGHINE;

APPLICATION FILED APR.10.1908.

Patented June 1, 1909.

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H. B. RANDALL.

WOODWORKING MACHINE.

APPLIoATIoN 1'IL 1.D APR. 10.1908.

Patented .nine 1,1909.

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H. B. RANDALL. WOODWORKING MACHINE. APPLICATION FILED APR. 10.1908.

VPatented June 1, 1909.

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HARRY B. RANDALL, OF UNION CITY, PENNSYLVANIA.

WOODWORKING-IVIACHINE Specification of Letters Patent.

Patented June 1, 1909.

Application filed April 10, 1908. Serial No. 426,287.

To all 'whom 'it may concern:

Be it known that I, HARRY B. RANDALL, a citizen of the United States, residing at Union City, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in WoodWorking-Machines, of which the following is a specification.

This invention relates to wood working machines, and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims. l

The machine is specially designed for forming patterns on the surfaces of blanks,

such for example, as chair seats.

In the exemplification of the invention illustrated the machine is designed to form chair seats having a scoop and saddle pattern therein.

In carrying out the invention I utilize an endless carrier with automatic clamps on which the blanks may be placed as the carrier moves, the clamps automatically engaging the blanks holding them in place. The endless carrier then travels under knives or other devices which are operated to and from the carrier to form upon the blank the desired pattern. After the blank has passed under the device for forming the pattern, the clamps are automatically loosened and the seat discharged. The endless carrier travels in one direction and permits of a continuous travel to different instrumentalities, the blanks being laid successively upon the carrier.

The invention is illustrated in the accompanying drawings as follows: Figure 1 shows a plan view of the discharge or back end of the machine. Fig. 2 a plan view of the front end of the machine. The part shown in Fig. 1 being a continuation of the part shown in Fig. 2. Fig. 3 is a section on the line 3-3 in Fig. 1. Fig. 4 a section on the line 4-4 in Fig. 4. Fig. 5 a detail view of one of the automatic clamps. Fig. 6 a section on the lines 6-6 in Figs. 2 and 4. Fig. 7 a detached view of one of the sections of the carrier. Fig. 8 a vertical section of a roll and a fragment of pattern track. Fig. 9 a side elevation of the machine.

1 1 mark the side frames of the machine. These are supported by the legs 2 and braced by the cross bar 3. They are provided with the V shaped guide Ways 4 in their upper edges which support the endless carrier 5.

The carrier is madeV up of the sections 6 which are connected together by the hinges 7, and each section is provided with the V shaped guide ways 8, which is adapted to run in the V shaped groove 4 in the frame, so that the carrier is not only supported and maintained in a proper position vertically, but is also made to travel in asti-aight line horizontally by means of the grooves and guides.

The carrier runs over the sprockets 9 and 10, the sprocket 9 being at the rear end ol the machine, and the sprocket 10 at the front end of the machine. These sprockets are preferably shaped with each face being of sufficient length to accommodate a section 6. They are mounted on the shafts 11 and 12 respectively. The face of each sprocket is notched at 18 and each of the sections 6 has a V shaped projection 14 which enters the notch 13 to assure a proper driving of the carrier, and a proper registering of the sections on the sprocket.

At the proper intervals along the carrier clam ing blocks 15 are provided against Whic the blanks are placed, these clamping blocks are carried by the posts 15a and may be adjusted and locked in position by the set screw 15b. Side gages in the shape of pins 15 are provided. These pins are secured in the slots 15d so that they may be adjusted for slight variations in sizes of blanks. The automatic clamp 16 is carried by bell crank lever 17, the bell crank lever being pivoted at 18 upon an arm or lug 19 extending from the bottom of section 6. In Fig. 4 a blank 20 is shown in place between the clamping blocks 15 and automatic clamp 16. A weight 21 is secured to the front end of the lever 17, and this weight engages a cam 22 as the carrier turns on the sprocket. This cam lifts the weight so as to open the clamp as the carrier turns on the sprocket. The blank can then be put in place and the weight 21 moves off the cam so that the clamp engages the blank and securely holds it before it reaches any of the cutters. A similar cam 23 is arranged in the path of the lever at the rear end of the machine and automatically lifts the Weight 21, and consequently operates the clamp to open it as the blank reaches the rear of the machine, so that the blank is removed or discharged as the carrier moves over the sprockets 9. y

In the machine shown the tools employed are a cutter 24 whichis shaped to cut the scoop of the seat. rlhe cutter 25 which is designed to form the l'ront or saddle part ol the seat 5 a sander 26 ci the same shape as on cutter 24 to sand the scoop of the seat; a sander 27 to sand the saddle portion'o the seat; a sander 2S similar in shape to the sander 26 but ordinarily of 'liner grade, and a sander 29 for sanding the surfaces outside ol the scoop or saddle'. All oi these dirl'erent tools are rotated at a speed common to such tools, and each is carried by similar mechanisms. The posts 3l extend upvtfardly from the side frames l. A cross piece 32 is journaled in bearings 30 at the upper en( s oi the posts 3]. Rock arms 33 are iixed on the cross pieces 32 and extend forwardly having the bearings 33a for the shafts 34 carrying t the several tools above mentioned. These shafts 34 are provided with the drive pulleys 24a, 25a, 26a, 27a, 23FL and 29 corresponding with the several tools and each of these are connected by belts to a single drive pulley 35 mounted on the drive shaft 36, the outer belts ruiming over the inner belts as clearly shown in Fig. 9.

Supporting arms 37 extend downwardly from the rock arms 33. These are extended through the rock arms and have their upper ends screw threaded, the lower part as it enters the rock arms being squared to prevent turning. Nuts 3S having worm gears on their outer peripheries are screwed onto the upper ends of the supporting rods 37. These are held in place by the lugs 39. lfvorms 40 engage the worm gears on the nuts 33. The worms 40 are carried by the rods 41 extending across the head so that the two worms 40 at each side of the machine operate together. The rods are provided by a crank 42 by which it may be turned to adjust the supporting rod 37. By this mechanism it will be noted that the supporting rods at each side of the head work together, the worms and nuts forming a paralleling device for this purpose. Rollers 43 are arranged on the heads utilized for 'r'orming the scoops and rollers 44 are arranged on the rods 37 for the heads that are utilized l'or forming the saddle. Pattern tracks 45 and 46 are arranged along the sides of the carrier in the path of the rolls 43 and 44. The pattern tracks supporting the rolls 43 and 44 respectively7 and consequently supporting the heads to which the rods 37 are attached. he desired patterns are formed in these tracks as shown, these patterns are the long depressions 45a for the scoop and the double depression 46a for forming the saddle. The rolls 43 forming the scoop travel on the outer track 45, and roll 44 on the inner track.

The blanks are positioned on the carrier relatively to the pattern as desired. Wlhen a blank opposite the pattern 45a reaches the head having the cutter 24, the rolls 43 enter allowed to drop sulliciently to l'orm the scoop in the seat, and when the same blank reaches a position opposite the saddle cutter or head 25 the rollers 44 which are arranged to travel over the track 4G follow into they grooves or depressions 46 and form the saddle. The sanding rolls operate in a similar manner each following the pattern inst as the cutters do. rThe sand roller 29 is supported by the roller 43 a, and while the sand roll may support the heads sullicient l'or the llat surl'aees, preier to allow the roll 43 to ride directly inthe plates 46, so that it may bc adjusted as desired.

The shalt 11 has the drive 'pulley 47 arranged upon it, and this is driven l'rom a pulley 49 on the shal't 36 by means ol` the belt 4S. lt is desirable, that the carrier, and the dilierent heads be driven l`ro1n the same source ol' power, so that when one is properly speeded any variation olI speed in one involves the same variation in the other.

That l claim as new is.

1. In a wood working` machine, the combination oll an endless carrier; a track mounted on the carrier at its side and having a plurality olI similar patterns along the line olI the track l'ormed ol' raised and depressed portions relatively to the path olI movement ol` the carrier; a plurality oll wood working heads comprising a shaping head and a linishing head of the same. pattern; movable mountings lor said heads; supports l'or said rnountings, said supports resting on said track, each pattern ol' the track successively engaging the respective supports oll the mountings l'or the shaping and linishing eutters to give the same pattern movement to both cutters to and l'roin. the path oll the carrier and at right angles to the axes ol' they cut l ters and operating each support independently ol' the movement or position olI any other support.

12. In a wood working machine, the combination of an endless carrier; a plurality ol' tracks mounted on the larrier at its side, each track having a plurality ol similar patterns along the line ol` the track formed ol` raised and depressed portions relatively to the path ol' movement oll the carrier, the patterns oll one track differing from those on the other track; a plurality olI wood working heads comprising a shaping head and a lin ishing head olI the same pattern; movable mountings i'or said head; supports lor said mountings oijierating on one ol' said tracks, each pattern olI this track successively engaging the respective supports ol` the mountings for the shaping and linishing cutters to give the same pattern movement toward and lrom the path of the carrier and at right an gles to the axes oll the cutters and operating each support mdepeinlently ol' the movement, or position ol any other support g a wood the depression 45a so that the cutters 24 are l working head oll dil'licrent pattern, a mov able mounting for said head; and supports for said mounting operating upon the other of said tracks. f

3. In a Wood Working machine, the combination of an endless carrier; a plurality of tracks mounted on the carrier at its side, each track having a plurality of similar patterns along the line of the track formed of raised and depressed portions relatively to the path of movement of the carrier, the patterns of one track differing from those on the other track; a plurality of Wood Working heads comprising a shaping head and a finishing head of the same pattern; movable mountings for said head; supports for said mountings operating on one of said tracks, each pattern of this track successively engaging the respective supports of the mountings for the shaping and Jfinishing cutters to give the same pattern movement toward and from the path of the carrier and at right angles to the axes of the cutters and operating each support independently of the movement or p0- sition of any other support; a second series of Wood Working heads comprising a shaping cutter and a finishing cutter of the same pattern; movable mountings for the second series of heads; supports therefor resting on the other oi' said tracks, the patterns thereof successively engaging the supports i'or the second series of heads to give the same pattern movement to said second series of heads toward and Vfrom the path oil the carrier and at right angles to the axes of the heads.

In testimony whereof I have hereunto set my hand in the presence oi' two subscribing Witnesses.

HARRY B. RANDALL.

Witnesses:

C. D. HIGBY, K. R. KANE. 

